\begin{equation*}
  \xymatrix{
    A & B
  }
\end{equation*}

\begin{flushright}
    \begin{tabular}{@{}p{.4in}p{2.1in}@{}}
       Signed: & \hrulefill \\
                    & Krishnakumar Gopalakrishnan \\
                    & July 24, 2019\\
                    & London, United Kingdom \\
              \end{tabular}
    \end{flushright}
